PDFree › Blog › How to Add a Watermark to a PDF
3-minute read · Updated July 2026
Need to stamp a PDF with CONFIDENTIAL, DRAFT, your company name, or a copyright notice? Here's how to add a text watermark to any PDF for free — without uploading your file to any server.
Add a watermark to your PDF now
No account. No upload. File stays on your device.
Watermark PDF — FreeGo to pdfree.io/watermark-pdf/. No installation, no sign-up required.
Click "Choose files" or drag your PDF onto the page. The file loads entirely in your browser — nothing is uploaded to any server.
Type the watermark text — CONFIDENTIAL, DRAFT, your company name, or anything else. Set the font size, color, opacity (0–100%), and rotation angle. Choose diagonal layout for a classic look, or tiled to cover the full page.
Click "Add Watermark". The text is stamped on every page and the PDF downloads immediately to your device.
Legal documents, HR files, contracts, and financial reports that should not be shared outside the organization. A diagonal CONFIDENTIAL stamp at 30–40% opacity makes the status clear without obscuring the content.
Working versions of reports, proposals, or designs that are not yet final. Stamping DRAFT prevents the recipient from treating an in-progress document as the official version.
Brand your PDFs with your company name or website URL. Useful for distributing presentations, ebooks, or white papers where you want to maintain brand presence even if the file is shared onwards.
Photographers, designers, and writers watermark PDFs with "© 2026 Your Name" to assert ownership on shared portfolios or sample work.
Exam papers, evaluation copies, and review materials where distribution should be restricted.
Opacity is the most important setting to get right. Too high and the watermark obscures the text beneath; too low and it's barely noticeable.
| Opacity | Best for |
|---|---|
| 10–20% | Subtle background marking — barely visible, just enough to identify the document |
| 25–40% | CONFIDENTIAL / DRAFT — clearly visible on page but doesn't block reading |
| 50–70% | Strong branding or copyright — prominent, harder to ignore |
| 80–100% | Proof / sample copies — intentionally obstructs content to prevent use |
Ready to watermark your PDF?
Free, instant, private — no account required.
Add Watermark to PDF — FreeOpen pdfree.io/watermark-pdf/, load your PDF, type CONFIDENTIAL in the text field, set opacity to 30–40%, and click "Add Watermark". The stamped PDF downloads immediately — no upload required.
PDFree applies the watermark to all pages at once. To watermark only specific pages: use Split PDF to separate the pages you want to stamp, apply the watermark, then combine everything back with Merge PDF.
Yes. The watermark is embedded into the PDF page content, not as a layer that can be toggled off. For practical purposes it is permanent — a standard PDF viewer cannot remove it.
Very slightly. A text watermark is stored as a PDF drawing operation — typically under 5 KB per page. For a 10-page PDF the size increase is negligible.
PDFree supports text watermarks only. Text covers the most common needs: CONFIDENTIAL, DRAFT, company name, copyright notice, DO NOT COPY. For image-based watermarks, desktop PDF software is required.
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